added multiple keypairs/signers functions

[nickfrosty]

Summary of Changes

added key and signer functions for:

• generating extractable keypairs
• loading keypairs/signers from env variables
• saving keypairs/signers to env file
• saving a keypairs/signers to a json file

and updated the readme to include all of these and general info about generating signers

[changeset-bot]

🦋 Changeset detected

Latest commit: 8a0c731

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

This PR includes changesets to release 2 packages

Name	Type
gill	Minor
gill-examples-basic	Patch

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[bundlemon]

BundleMon

Files updated (4)

Status	Path	Size	Limits
✅	gill/dist/node/index.node.mjs	914B (+498B +119.71%)	-
✅	gill/dist/index.browser.mjs	5.88KB (+478B +8.62%)	-
✅	gill/dist/index.native.mjs	5.88KB (+478B +8.62%)	-
✅	gill/dist/index.node.mjs	1.36KB (+46B +3.41%)	-

Unchanged files (9)

Status	Path	Size	Limits
✅	gill/dist/programs/token/index.node.mjs	1.87KB	-
✅	gill/dist/programs/index.node.mjs	739B	-
✅	react/dist/index.browser.mjs	325B	-
✅	react/dist/index.native.mjs	323B	-
✅	react/dist/index.node.mjs	322B	-
✅	svelte/dist/index.browser.mjs	265B	-
✅	vue/dist/index.browser.mjs	265B	-
✅	svelte/dist/index.node.mjs	262B	-
✅	vue/dist/index.node.mjs	262B	-

Total files change +1.47KB +8.56%

Final result: ✅

View report in BundleMon website ➡️

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Current branch size history | Target branch size history