revert: tea 1.0 rewrite (#1122–#1126) (#1146)

Reverts #1126, #1125, #1124, #1123 and #1122.

`go.mod` keeps the Go 1.26 line with toolchain `go1.26.9` (instead of the original `go1.26.6`) so the security fix from #1131 isn't lost.

reopens #69
reopens #141
reopens #162
reopens #172
reopens #197
reopens #232
reopens #240
reopens #246
reopens #323
reopens #325
reopens #326
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reopens #351
reopens #373
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reopens #430
reopens #457
reopens #480
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reopens #569
reopens #571
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reopens #666
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reopens #831
reopens #833
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reopens #966
reopens #1023
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reopens #1032
reopens #1050
reopens #1052
reopens #1069
reopens #1073
reopens #1087
reopens #1091
reopens #1094
reopens #1110
reopens #1115
reopens #1116
reopens #1118

Reviewed-on: https://gitea.com/gitea/tea/pulls/1146
Reviewed-by: TheFox0x7 <95654+thefox0x7@noreply.gitea.com>

.gitea/workflows/release-nightly.yml

@@ -33,6 +33,9 @@ jobs:
         with:
           gpg_private_key: ${{ secrets.GPGSIGN_KEY }}
           passphrase: ${{ secrets.GPGSIGN_PASSPHRASE }}
+      - name: get SDK version
+        id: sdk_version
+        run: echo "version=$(go list -f '{{.Version}}' -m gitea.dev/sdk)" >> "$GITHUB_OUTPUT"
       - name: goreleaser
         uses: goreleaser/goreleaser-action@f06c13b6b1a9625abc9e6e439d9c05a8f2190e94 # v7
         with:
@@ -40,6 +43,7 @@ jobs:
             version: "~> v2"
             args: release --nightly
         env:
+          SDK_VERSION: ${{ steps.sdk_version.outputs.version }}
           GORELEASER_KEY: ${{ secrets.GORELEASER_KEY }}
           R2_ENDPOINT: ${{ secrets.R2_ENDPOINT }}
           R2_BUCKET: ${{ secrets.R2_BUCKET }}