Shared GPIO Implementation (#3)

* make esp32c3 examples run from flash / flashable
* use gpio3 for blinky
* direct boot in Cargo.toml
* have a shared gpio impl
* use PACs from their original locations again

.vscode/settings.json

@@ -1,4 +1,7 @@
 {
+    "rust-analyzer.cargo.features": [
+        "esp32c3"
+    ],
     "editor.formatOnSave": true,
     "rust-analyzer.checkOnSave.allTargets": false
-}
+}

Cargo.toml

@@ -4,5 +4,5 @@ members = [
     "esp32-hal",
     "esp32c3-hal",
     "esp32s2-hal",
-    "esp32s3-hal",
+    "esp32s3-hal"
 ]

esp-hal-common/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
+paste = "1.0.6"
 embedded-hal = { version = "0.2", features = ["unproven"] }
 nb           = "1.0"
 riscv        = { version = "0.7", optional = true }
@@ -12,7 +13,7 @@ xtensa-lx    = { version = "0.4", optional = true }
 # IMPORTANT:
 # Each supported device MUST have its PAC included below along with a
 # corresponding feature.
-esp32_pac   = { package = "esp32",   git = "https://github.com/jessebraham/esp32.git",   branch = "develop", optional = true }
+esp32_pac   = { package = "esp32", git = "https://github.com/jessebraham/esp32.git", branch = "develop", optional = true }
 esp32c3_pac = { package = "esp32c3", git = "https://github.com/jessebraham/esp32c3.git", branch = "develop", optional = true }
 esp32s2_pac = { package = "esp32s2", git = "https://github.com/jessebraham/esp32s2.git", branch = "develop", optional = true }
 esp32s3_pac = { package = "esp32s3", git = "https://github.com/jessebraham/esp32s3.git", branch = "develop", optional = true }