Fix yarn lint:types when matrix-js-sdk is not yarn linked. (#30612)

* Add missing dependencies on `@types` packages

Because we import the typescript source from matrix-js-sdk rather than the
`.d.ts` files, `tsc` ends up type-checking the js-sdk source. That means that
we need to have the `@types` packages that js-sdk needs.

* Add missing type definitions for `setInterval` and `setTimeout`

Our source assumes that `setTimeout` returns a number, not a
`Timeout`. If we `yarn link` js-sdk, then (somehow) we end up using the
definitions from there, but it's not really correct.

* Configure knip to ignore new deps

yarn.lock

@@ -3965,6 +3965,11 @@
   dependencies:
     "@types/node" "*"
 
+"@types/content-type@^1.1.9":
+  version "1.1.9"
+  resolved "https://registry.yarnpkg.com/@types/content-type/-/content-type-1.1.9.tgz#a0240a8141b33549ac0ca6847f4b801580012bca"
+  integrity sha512-Hq9IMnfekuOCsEmYl4QX2HBrT+XsfXiupfrLLY8Dcf3Puf4BkBOxSbWYTITSOQAhJoYPBez+b4MJRpIYL65z8A==
+
 "@types/counterpart@^0.18.1":
   version "0.18.4"
   resolved "https://registry.yarnpkg.com/@types/counterpart/-/counterpart-0.18.4.tgz#e3e331b7e0d5496873d417839f3b2bbcf555bb73"
@@ -4334,6 +4339,11 @@
   dependencies:
     htmlparser2 "^8.0.0"
 
+"@types/sdp-transform@^2.4.10":
+  version "2.4.10"
+  resolved "https://registry.yarnpkg.com/@types/sdp-transform/-/sdp-transform-2.4.10.tgz#f4e60fbc97f66527f221a3ae092be7c465c55f56"
+  integrity sha512-999diMTpgQGt+dj+tAEQNvBAJYkOip83NJn1RruqNmqeLYNZpQnUX/YrugR+ekXvdJ9pdkZtYg1jiM3mG3NhRg==
+
 "@types/seedrandom@^3.0.8":
   version "3.0.8"
   resolved "https://registry.yarnpkg.com/@types/seedrandom/-/seedrandom-3.0.8.tgz#61cc8ed88f93a3c31289c295e6df8ca40be42bdf"