[envsec] Implement init survey (#232)

## Summary

This implements a simplified version of the init survey. Basically:

```
// flow:
// 0. Ask if you want to overwrite existing config [y/N]
// 1. Link to an existing project? [Y/n]
// 2a. What project would you like to link to? (sorted by repo/dir match)
// 2b. What’s the name of your new project?
```
 
A few other cleanup:

* Got rid of `jetcloud` package. Split into `api` and `git`
* Use transport to add auth token. (@savil we should probably do the
same for secrets API).

## How was it tested?

`envsec init`

devbox.lock

@@ -2,14 +2,44 @@
  "lockfile_version": "1",
  "packages": {
  "[email protected]": {
- "last_modified": "2023-05-01T16:53:22Z",
- "resolved": "github:NixOS/nixpkgs/8670e496ffd093b60e74e7fa53526aa5920d09eb#go",
- "version": "1.20.3"
+ "last_modified": "2023-12-13T22:54:10Z",
+ "resolved": "github:NixOS/nixpkgs/fd04bea4cbf76f86f244b9e2549fca066db8ddff#go_1_20",
+ "source": "devbox-search",
+ "version": "1.20.12",
+ "systems": {
+ "aarch64-darwin": {
+ "store_path": "/nix/store/vgygiqcs16im3ffw6p0bv9zihixxg0cl-go-1.20.12"
+ },
+ "aarch64-linux": {
+ "store_path": "/nix/store/rlk4nvwrz6rl7r87sn5g6v2vr2mhq8nv-go-1.20.12"
+ },
+ "x86_64-darwin": {
+ "store_path": "/nix/store/vw51wxs8110al4q12pbg3vpi78w8ijk9-go-1.20.12"
+ },
+ "x86_64-linux": {
+ "store_path": "/nix/store/s05mmkyf6sm6vskb4fwbjq0x93sqalqr-go-1.20.12"
+ }
+ }
  },
  "golangci-lint@latest": {
- "last_modified": "2023-05-01T16:53:22Z",
- "resolved": "github:NixOS/nixpkgs/8670e496ffd093b60e74e7fa53526aa5920d09eb#golangci-lint",
- "version": "1.52.2"
+ "last_modified": "2023-11-17T14:14:56Z",
+ "resolved": "github:NixOS/nixpkgs/a71323f68d4377d12c04a5410e214495ec598d4c#golangci-lint",
+ "source": "devbox-search",
+ "version": "1.55.2",
+ "systems": {
+ "aarch64-darwin": {
+ "store_path": "/nix/store/ggfyqw5kl0dy7l6nhajcyayiw05wzrb1-golangci-lint-1.55.2"
+ },
+ "aarch64-linux": {
+ "store_path": "/nix/store/ak3wnmbc43wqgg9zky98i44nazxvklqg-golangci-lint-1.55.2"
+ },
+ "x86_64-darwin": {
+ "store_path": "/nix/store/xckmcrd22nij4xwzdiw8ydc4z00rgcd2-golangci-lint-1.55.2"
+ },
+ "x86_64-linux": {
+ "store_path": "/nix/store/xiy36g6w9qcgzkyifi9hf7ayj2drap9k-golangci-lint-1.55.2"
+ }
+ }
  }
  }
-}
+}