docs: mark the falco version in install snippets for release please

[TheMeinerLP]

Proposed changes

Stacked on #101 (docs/correct-stale-facts); merge that one first.

Marks every snippet in README.md and docs/ that states Falco's own current version, so Release Please can raise it together with build.gradle.kts. The markers are inert until the follow-up PR lists the three files under extra-files.

• README.md: the quick-start code block, wrapped in <!-- x-release-please-start-version --> / <!-- x-release-please-end --> outside the fence. The version also moves from 3.0.0 to 3.0.1, which is what main released.
• docs/how-to/add-falco-to-your-build.md: the BOM-and-modules block and the "without the BOM" block, wrapped the same way.
• docs/reference/modules-and-coordinates.md: the five Current version cells, each with an inline <!-- x-release-please-version --> inside the cell.

The markers are HTML comments outside the code fences, so neither GitHub nor GitBook shows them. Not marked on purpose: the tutorial snippet, because its block also names Minestom (2026.10.07-26.2) and the generic updater replaces the first semver on every line of a marked block; the Since rows; examples such as falco-anvil:1.0.0 in build-setup.md, which are not the current version. Renovate catches the unmarked tutorial snippet (next PR).

Types of changes

• Documentation Update (if none of the other choices apply)

Checklist

• The title of this pull request is a Conventional Commit
• ./gradlew build is not affected (Markdown only); the link and anchor check over docs/ reports no problems

Further comments

Counter-check, run against the real updater (release-please@latest, Generic.updateContent with version 9.8.7) on the files of this branch: exactly 1 line changed in README.md, 6 in the how-to page (the BOM line and the five module lines), 5 in the reference page (the Current version rows), 0 in the unmarked tutorial. No Since row and no Minestom line changed.

Not covered here: the Maven snippets of the how-to page live in #102. Their falco-bom block can take the same markers once #102 is rebased; the dependency block cannot, because it also contains the Minestom <version>. Renovate covers both (next PR).

https://claude.ai/code/session_01Q6AxU7jRLmNPHdwg2GpasT