[email protected]: Add notes about DLLs

[YDX-2147483647]

Add some notes on how to use DLLs.

Closes #12055

> scoop install ./fluidsynth.json
Installing 'fluidsynth' (2.3.4) [64bit]
Loading fluidsynth-2.3.4-win10-x64.zip from cache.
Checking hash of fluidsynth-2.3.4-win10-x64.zip ... ok.
Extracting fluidsynth-2.3.4-win10-x64.zip ... done.
Linking ~\scoop\apps\fluidsynth\current => ~\scoop\apps\fluidsynth\2.3.4
Creating shim for 'fluidsynth'.
'fluidsynth' (2.3.4) was installed successfully!
Notes
-----
This manifest contains the barebones FluidSynth installation.
For appropriate programming DLLs, add `~/scoop/apps/fluidsynth/current/bin` to PATH.
For example, executing `$env:Path += ";$(Resolve-Path '~/scoop/apps/fluidsynth/current/bin')"` will add it to PATH for the
current shell.

Relates to #11280

• I have read the Contributing Guide.

[YDX-2147483647]

/verify

[github-actions]

All changes look good.

Wait for review from human collaborators.

fluidsynth

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