feat: add Twitter/X meta tags and fix og:image URL

The compatibility matrix was measured against the pre-removal harness. With
dryrun.feature, dryrun_testing.feature and dryrun_trace.feature gone
upstream, the suite is 11/11 integration and 5/16 unit across 27 features,
and a fresh harness reports 249 scenarios passed, 0 failed (265 collected,
16 excluded).

Verified twice against the now-pinned harness at 0fbe354f, both runs
identical. The 227 offline-test figure is unchanged.

test.env tracked algorand-sdk-testing's master, so any upstream edit to the
shared feature files landed as a red build on whatever unrelated PR ran
next. The dryrun removal in algorand/algorand-sdk-testing#325 broke a
docs-only branch a month after it was merged, with nothing in this repo
having changed.

Pin SDK_TESTING_BRANCH to 0fbe354f, the tree the suite was last verified
green against. algorand-sdk-testing publishes no tags or releases, so a
commit SHA is the only stable ref available.

`git clone --branch` accepts a branch or tag but not a SHA, so fetch the ref
explicitly instead. The fetch stays shallow and resolves all three kinds of
ref, so SDK_TESTING_BRANCH=master still works for testing against upstream
tip. The script now logs which ref it resolved.

algorand-sdk-testing removed dryrun.feature, dryrun_testing.feature and
dryrun_trace.feature in algorand/algorand-sdk-testing#325 (2026-07-14).
test.env tracks that repo, so a fresh CI clone no longer ships those files
while the runner still listed the first two as live. cucumber reported two
parsing errors and the suite exited 1 — on a docs-only branch, a month
after the upstream change landed.

Drop all three Feature entries, along with the step definitions they were
the only callers of: the integration dryrun module, the World's
dryrun_response and dryrun_kind fields, the two unit dryrun steps (upstream
stripped dryrun from v2algodclient_responses.feature in the same commit),
and UnitResponse::Dryrun. Every step phrase involved was exclusive to the
deleted features.

The SDK's dryrun support is untouched: algonaut::dryrun, algod.teal_dryrun,
the models and the trace printer all ship, covered by the unit tests in
src/dryrun.rs. What is gone is the live-node coverage, and that went when
upstream deleted the fixtures.

The README documented what algonaut does but never stated how it compares
to the reference SDK or what it is verified against, so a reader had no way
to judge coverage or find the gaps without reading the source.

Add a Compatibility section with two reference points:

- The cross-SDK algorand-sdk-testing acceptance suite: per-feature status
  for all 30 upstream features (13/13 integration, 5/17 unit), the 274/0
  fresh-harness result, and the rationale behind every skipped scenario.
- js-algorand-sdk v3.7.0: a surface-by-surface capability matrix across
  clients, transactions, signing, groups/ABI, and tooling.

Gaps are stated explicitly rather than omitted — algod 5.0 / Falcon-1024
post-quantum accounts and resource access lists, TEAL signing, ufixedNxM
and anonymous tuples in contract! (#345), the 12 unit features awaiting
step definitions, and the lack of a pluggable HTTP transport.

clippy 1.97 promotes `useless_borrows_in_formatting` to fire on
`write!(f, "{}", &BASE64.encode(..))`. CI pins `rust-toolchain@stable`,
so this fails the clippy job as runners pick up the new release, and it
already fails the pre-commit hook locally.

Updates the requirements on [vue-router](https://github.com/vuejs/router) to permit the latest version.
- [Release notes](https://github.com/vuejs/router/releases)
- [Commits](https://github.com/vuejs/router/compare/v5.2.0...v5.3.0)

---
updated-dependencies:
- dependency-name: vue-router
  dependency-version: 5.3.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Updates the requirements on [@vue/compiler-sfc](https://github.com/vuejs/core/tree/HEAD/packages/compiler-sfc) to permit the latest version.
- [Release notes](https://github.com/vuejs/core/releases)
- [Changelog](https://github.com/vuejs/core/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vuejs/core/commits/v3.5.42/packages/compiler-sfc)

---
updated-dependencies:
- dependency-name: "@vue/compiler-sfc"
  dependency-version: 3.5.42
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>