docs(commands): use more idiomatic commands per package manager

docs/src/content/docs/commands/list.mdx

@@ -20,12 +20,12 @@ It then sorts the migrations by filename in ascending order and outputs them and
   </TabItem>
   <TabItem label="pnpm">
     ```bash
-    pnpm exec emigrate list [options]
+    pnpm emigrate list [options]
     ```
   </TabItem>
   <TabItem label="yarn">
     ```bash
-    yarn exec emigrate -- list [options]
+    yarn emigrate list [options]
     ```
   </TabItem>
   <TabItem label="package.json">

docs/src/content/docs/commands/new.mdx

@@ -19,12 +19,12 @@ The migration file can be based on a template, generated by a [generator plugin]
   </TabItem>
   <TabItem label="pnpm">
     ```bash
-    pnpm exec emigrate new [options] <name>
+    pnpm emigrate new [options] <name>
     ```
   </TabItem>
   <TabItem label="yarn">
     ```bash
-    yarn exec emigrate -- new [options] <name>
+    yarn emigrate new [options] <name>
     ```
   </TabItem>
   <TabItem label="package.json">

docs/src/content/docs/commands/remove.mdx

@@ -17,12 +17,12 @@ The `remove` command is used to remove a migration from the history. This is use
   </TabItem>
   <TabItem label="pnpm">
     ```bash
-    pnpm exec emigrate remove [options] <name>
+    pnpm emigrate remove [options] <name>
     ```
   </TabItem>
   <TabItem label="yarn">
     ```bash
-    yarn exec emigrate -- remove [options] <name>
+    yarn emigrate remove [options] <name>
     ```
   </TabItem>
   <TabItem label="package.json">

docs/src/content/docs/commands/up.mdx

@@ -22,12 +22,12 @@ If any of the migrations fail, the command will be aborted and the rest of the m
   </TabItem>
   <TabItem label="pnpm">
     ```bash
-    pnpm exec emigrate up [options]
+    pnpm emigrate up [options]
     ```
   </TabItem>
   <TabItem label="yarn">
     ```bash
-    yarn exec emigrate -- up [options]
+    yarn emigrate up [options]
     ```
   </TabItem>
   <TabItem label="package.json">