[LuLaValva]

Adds backticks as a way to write text in concise mode, alongside --:

p `Hello ${name}`
p `
  Several lines of text,
  closed by a line of the same backticks.
`

The text is exactly what follows the opening backticks, so leading and trailing whitespace is kept, and the closing backticks are optional on a single line. That makes inline markup much easier to read than with --, which has to skip a separator character and has no way to mark where trailing whitespace ends.

One thing that changes: a backtick after whitespace, where an attribute could start, used to be read as an attribute named by a template literal. It is now text.

The PR is three commits that read in order:

1. A fix for a concise line that ends its open tag before any tag name (for example a line starting with ;). The parser emitted an open tag end with no name, which made consumers like the compiler throw. This one is independent of the rest and exists on main today.
2. onText and onPlaceholder ranges now report the delimiter that began their text block, so tools like Prettier can print text back the way it was written.
3. The backtick syntax itself.

Once this is released, the compiler and prettier-plugin-marko should raise their htmljs-parser floor together. Related PRs: Prettier and the language server grammar, in the other repos.

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[changeset-bot]

🦋 Changeset detected

Latest commit: aa421e0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
htmljs-parser	Minor

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.91%. Comparing base (3b59c74) to head (aa421e0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #260      +/-   ##
==========================================
+ Coverage   99.89%   99.91%   +0.02%     
==========================================
  Files          35       35              
  Lines        4711     4875     +164     
  Branches      912      949      +37     
==========================================
+ Hits         4706     4871     +165     
+ Misses          4        3       -1     
  Partials        1        1              

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