Switch from yarn classic to pnpm (#31971)

* Switch shared-components from yarn classic to pnpm

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Switch element-web from yarn classic to pnpm

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Switch CI to pnpm

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Update docs & comments

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* Hold back postcss to match yarn.lock & use workspace protocol

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* Tweak CI

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Rid the world of `$(res)`

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Switch to type=module

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix module import

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Make knip happy

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* Update playwright imports

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* Make docker build happy

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Remove stale params

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix badly formatted logging

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Switch to lodash-es

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Make jest happier

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Switch element-web to ESM

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* Update testcontainers imports

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix modernizr cjs

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix modernizr cjs ignore files

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Move modernizr sonar exclusion to exclude everything

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Update playwright tests for esm compat

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* Add pnpm-link utility

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* Test matrix-web-i18n

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

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* Discard changes to src/vector/index.ts

* Update playwright-common

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Use catalogs

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Improve pnpm-link script

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Use pnpm import to regenerate lockfile from yarn.lock

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

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Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

docs/translating-dev.md

@@ -50,7 +50,7 @@ We are aiming for a set of common strings to be shared then some more localised
 
 1. Check if the import `import { _t } from ".../languageHandler";` is present. If not add it to the other import statements. Also import `_td` if needed.
 1. Add `_t()` to your string passing the translation key you come up with based on the rules above. If the string is introduced at a point before the translation system has not yet been initialized, use `_td()` instead, and call `_t()` at the appropriate time.
-1. Run `yarn i18n` to add the keys to `src/i18n/strings/en_EN.json`
+1. Run `pnpm i18n` to add the keys to `src/i18n/strings/en_EN.json`
 1. Modify the new entries in `src/i18n/strings/en_EN.json` with the English (UK) translations for the added keys.
 
 ## Editing existing strings